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Seasonal variation in bright daylight exposure, mood and behavior among a group of office workers in Sweden

Adamsson, Mathias LU ; Laike, Thorbjörn LU and Morita, Takeshi (2018) In Journal of Circadian Rhythms 16.
Abstract

The purpose of the study was to investigate seasonal variation in mood and behavior among a group of office workers in Sweden (56°N). Thirty subjects participated in this longitudinal study. The subjects kept a weekly log that included questionnaires for ratings of psychological wellbeing and daily sleep-activity diaries where they also noted time spent outdoors. The lighting conditions in the offices were subjectively evaluated during one day, five times over the year. There was a seasonal variation in positive affect and in sleep-activity behavior. Across the year, there was a large variation in the total time spent outdoors in daylight. The subjects reported seasonal variation concerning the pleasantness, variation and strength of... (More)

The purpose of the study was to investigate seasonal variation in mood and behavior among a group of office workers in Sweden (56°N). Thirty subjects participated in this longitudinal study. The subjects kept a weekly log that included questionnaires for ratings of psychological wellbeing and daily sleep-activity diaries where they also noted time spent outdoors. The lighting conditions in the offices were subjectively evaluated during one day, five times over the year. There was a seasonal variation in positive affect and in sleep-activity behavior. Across the year, there was a large variation in the total time spent outdoors in daylight. The subjects reported seasonal variation concerning the pleasantness, variation and strength of the light in the offices and regarding the visibility in the rooms. Finally, the subjects spent most of their time indoors, relying on artificial lighting, which demonstrates the importance of the lighting quality in indoor environments.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Circannual, High latitude, Light exposure, Lighting conditions, Psychological wellbeing, Sleep-wake behavior
in
Journal of Circadian Rhythms
volume
16
publisher
BioMed Central
external identifiers
  • scopus:85051856248
DOI
10.5334/jcr.153
language
English
LU publication?
yes
id
79c61c0f-9c56-482c-8769-ed0557099419
date added to LUP
2018-09-12 08:45:21
date last changed
2019-02-20 11:26:28
@article{79c61c0f-9c56-482c-8769-ed0557099419,
  abstract     = {<p>The purpose of the study was to investigate seasonal variation in mood and behavior among a group of office workers in Sweden (56°N). Thirty subjects participated in this longitudinal study. The subjects kept a weekly log that included questionnaires for ratings of psychological wellbeing and daily sleep-activity diaries where they also noted time spent outdoors. The lighting conditions in the offices were subjectively evaluated during one day, five times over the year. There was a seasonal variation in positive affect and in sleep-activity behavior. Across the year, there was a large variation in the total time spent outdoors in daylight. The subjects reported seasonal variation concerning the pleasantness, variation and strength of the light in the offices and regarding the visibility in the rooms. Finally, the subjects spent most of their time indoors, relying on artificial lighting, which demonstrates the importance of the lighting quality in indoor environments.</p>},
  articleno    = {2},
  author       = {Adamsson, Mathias and Laike, Thorbjörn and Morita, Takeshi},
  keyword      = {Circannual,High latitude,Light exposure,Lighting conditions,Psychological wellbeing,Sleep-wake behavior},
  language     = {eng},
  month        = {02},
  publisher    = {BioMed Central},
  series       = {Journal of Circadian Rhythms},
  title        = {Seasonal variation in bright daylight exposure, mood and behavior among a group of office workers in Sweden},
  url          = {http://dx.doi.org/10.5334/jcr.153},
  volume       = {16},
  year         = {2018},
}